Home / 128,001.70-192,002.55-39,268.90

Finding the Fourth Proportional to 128,001.70, 192,002.55 and 39,268.90

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Solution

The fourth proportional to 128,001.70, 192,002.55 and 39,268.90 is: 58,903.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,001.70 : 192,002.55 = 39,268.90 : x
  2. Step 2: Convert to fraction form
    128,001.70/192,002.55 = 39,268.90/x
  3. Step 3: Cross multiply
    128,001.70x = 192,002.55 × 39,268.90
  4. Step 4: Simplify right side
    128,001.70x = 7,539,728,935.70
  5. Step 5: Solve for x
    x = 7,539,728,935.70/128,001.70
  6. Step 6: Final answer
    x = 58,903.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.